Patch-Clamp Pipette Reuse via Detergent Cleaning

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Solution Overview

Problem

The existing patch-clamp recording technique requires fresh pipettes for each cell membrane contact due to adherent cellular debris, limiting high-throughput drug screening and automation, as cleanliness is paramount for gigaseal formation and pipettes cannot be reused.

Innovation Solution

A method involving immersion of pipette tips in a 2% Alconox detergent solution for 60 seconds, followed by rinsing, allows for multiple reuses of pipettes without degrading signal fidelity, enabling automated and unattended sequential patch-clamp recordings.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If fresh pipettes are used for each cell membrane contact, then gigaseal formation reliability is improved, but productivity deteriorates due to continuous pipette replacement

Engineering Contradiction:

Improvegigaseal formation reliabilityVSAvoidthroughput

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent implements a pipette recovery system where used pipettes are collected, cleaned through automated washing stations with detergent and rinsing solutions, and then reused for subsequent patch-clamp recordings. This eliminates the need to continuously discard and replace pipettes, thereby improving productivity while maintaining gigaseal formation reliability through proper cleaning protocols

Inventive Principle:

Principle #34Discarding and recovering

Solution Approach 2:

The system enables automated pipette cleaning and maintenance through self-service washing stations that automatically clean pipettes between recordings without requiring manual intervention. This self-service capability allows the system to maintain high productivity while ensuring pipette cleanliness for reliable gigaseal formation

Inventive Principle:

Principle #25Self-service

2Ease of operation

If manual pipette exchange is performed, then ease of operation deteriorates due to dexterity requirements, but device complexity is reduced

Engineering Contradiction:

Improveease of pipette exchangeVSAvoidautomation system complexity

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The patent replaces manual mechanical pipette exchange operations with an automated liquid handling system that uses robotic arms, precision motors, and computer control to perform pipette manipulation, cleaning, and replacement. This substitution eliminates the need for operator dexterity while managing device complexity through modular automated components

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system introduces automated liquid handling robots and washing stations as intermediary devices between the operator and the pipettes. These intermediaries perform the complex manual tasks of pipette exchange and cleaning, making the overall operation easier while concentrating the complexity in dedicated automated modules

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If specialized pipettes are used, then adaptability is improved, but ease of manufacture deteriorates due to custom requirements

Engineering Contradiction:

Improvepipette specialization capabilityVSAvoidmanufacturing complexity

Core Design Contradiction:

Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent segments the pipette system into standardized base components and interchangeable specialized tips or coatings. This allows different types of specialized pipettes (for different cell types or recording configurations) to be manufactured as modular components that can be easily attached to standard pipette bodies, improving ease of manufacture while maintaining adaptability

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system designs pipettes with universal base components that can accommodate different specialized attachments or coatings. This multi-functionality approach allows a single standardized pipette platform to serve multiple specialized applications, improving ease of manufacture while maintaining adaptability to different experimental requirements

Inventive Principle:

Principle #6Universality (Multi-functionality)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Pipettes can be reused at least ten times with no detectable Alconox residue, maintaining gigaseal formation and ion channel pharmacology results comparable to fresh pipettes, significantly improving automation and throughput in patch-clamp recordings.

Implementation Method 1

immersion of pipette tips in a 2% Alconox detergent solution

Methodology Applied

Scientific EffectSurfactant: Surfactant

Data Source

PatentEP3394283B1Systems and methods enabling patch-clamp re-use

Publication Date: 2021.07.14 GEORGIA TECH RES CORP

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AI summary

A method for cleaning patch-clamp glass pipette electrodes that enables their re-use. By immersing pipette tips or planar patch clamp chips into a detergent, followed by rinsing, pipettes and planar patch clamp chips were re-usable at least ten times with little to no degradation in signal fidelity, in experimental preparations ranging from human embryonic kidney cells to neurons in culture, slices, and in vivo.